Focal Point Debug fp-debug

When set to true, this places a crosshair overlay on the image that identifies where the focal point of the image is set.

To use debug mode, fit=crop and crop=focalpoint must also be set.

fp-x=.825&fp-y=.35&fp-z=1.5&fp-debug=true
Walrus.jpg?h=300&w=600&fit=crop&crop=focalpoint&fp x=.825&fp y=.35&fp z=1
fp-x=.12&fp-y=.55&fp-z=1.5&fp-debug=true
Walrus.jpg?h=300&w=600&fit=crop&crop=focalpoint&fp x=.12&fp y=.55&fp z=1